1. The U disk capacity is counted as "1MB=1000KB, 1GB=1000MB" while the operating system adopts binary algorithm as "1MB=1024KB, 1GB=1024MB". So the display capacity may differ from the nominal capacity.

2. The largest default space for each file is 4GB. If you need to save file whose single capacity is above 4GB, it is suggested to reformat the U disk and change it into NTFS OR exFAT file system.